The Gimme Something Good star announced his split from singer/actress Mandy in January, 2015 after almost six years as husband and wife, and he has since bounced back from the break-up by dating brunette beauty Butterworth, reports Us Weekly magazine.
Ryan, 41, was first spotted with the model at the South By South West (SXSW) festival in Austin, Texas in March (16), and sent her a birthday wish in April (16), when he posted a photo of Megan sitting on a bed, holding a guitar, on Instagram.com.
"Happy Bday (sic), shiny lovely ancient Moon XOOOOOOOOOOOO Emoticons of fire & stuff," he captioned the image.
The rocker has yet to comment on his rumoured new relationship.
Ryan and Mandy are still working through their divorce, with court papers filed last year (15) suggesting the couple actually separated in August, 2014, before deciding to make the news public the following January.
A joint statement released by the stars at the time of the split read: "Mandy Moore and Ryan Adams have mutually decided to end their marriage of almost six years. It is a respectful, amicable parting of ways and both Mandy and Ryan are asking for media to respect their privacy at this time."
Mandy, 32, has also found love again. Last July (15), she was said to have rebounded from the failed marriage with another rocker, Dawes singer Taylor Goldsmith.